\(\frac{1996\times1997+1998\times3}{1997\times1999-1997\times1997}=?\)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{-1}{2000\cdot1999}-\frac{1}{1999\cdot1998}-\frac{1}{1998\cdot1997}\)
\(=-\left(\frac{1}{2000\cdot1999}+\frac{1}{1999\cdot1998}+\frac{1}{1998\cdot1997}\right)\)
\(=-\left(\frac{1}{1997\cdot1998}+\frac{1}{1998\cdot1999}+\frac{1}{1999\cdot2000}\right)\)
\(=-\left(\frac{1}{1997}-\frac{1}{1998}+\frac{1}{1998}-\frac{1}{1999}+\frac{1}{1999}-\frac{1}{2000}\right)\)
\(=-\left(\frac{1}{1997}-\frac{1}{2000}\right)\)
\(=-\frac{3}{3994000}\)
1997.1996+1=1997.(1995+1)+1=1997.1995+19971+1=1997.1995+1998
\(\frac{1997x1996+1}{1995x1997+1996}\)=\(\frac{1996+1}{1995+1996}\)=\(\frac{1}{1995}\)
1995(1996+1)-1/1996.1995+1994
1995.1996+1995-1/1996.1995+1994
1995.1996+1994/1996.1995+1994=1
\(\frac{1995.1997-1}{1996.1995+199}\)= \(\frac{1995.\left(1996+1\right)-1}{1996.1995+199}\)
= \(\frac{1995.1996+1995.1-1}{1996.1995+199}\)
= \(\frac{1995.1996+1994}{1996.1995+199}\)
làm đến đây thì mình chịu
1996 x 1997 + 1998 x 3 + 1994 / 1997 x 1999 - 1997 x 1997
= 1996 x 1997 + ( 1997 + 1 x 3 ) + 1994 / 1997 x 1999 - 1997 x 1997
= 1996 x 1998 + 1 x 3 + 1994 / 1997 x 1999 - 1997 x 1997
= 3988008 + 3 + 1994 / 1997 x 1999 - 1997 x 1997
= 3990005 / 1997 x 1999 - 1997 x 1997
= 3990005 / ( 1999 - 1997 ) x 1997
= 3990005 / 3994
\(\frac{1996X1997+1998X3}{1997X1999-1997X1997}\)=\(\frac{3986012+5994}{3992003-3988009}\)=\(\frac{3992006}{3994}\)=\(\frac{1996003}{1997}\)
1996 x 1997 + 1998 x \(\frac{3}{1997}\)x 1999 - 1997 x 1997
= 3986012 + \(\frac{5994}{1997}\)x 1999 - 1997 x 1997
= 3986012 + 6000003005 x 1999 - 1997 x 1997
= 3986012 + 1199400601 - 3988009
= 1203386613 - 3988009
= 1199398604